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Video on difference between V6 and straight six engines #5112322 05/22/19 11:47 AM
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paulri Offline OP
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I just saw this on youtube: https://www.youtube.com/watch?v=u3XSfVPFM74

I really liked how simple it was for a non-mechanic like myself.

Is this accurate? Any points that he might have left out, in the pros/cons?


2005 Toyota Sienna LE; 163,000 miles
2006 Toyota Highlander Hybrid 118,000 miles
Re: Video on difference between V6 and straight six engines [Re: paulri] #5112417 05/22/19 01:40 PM
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Kira Offline
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Accurate, yes.
Wanna show 'em how smart you really are???....get a 4.

Volvo made their 5 cylinder engines since the '80's with great success.
They made 2.0, 2.3, 2.4, 2.5 liter versions in both turbocharged and normally aspirated variants.
2007 was the last year Volvo offered the 5 cylinder.
Volvo also made 4 cylinder engines using the same design.
I suppose they still make a 4.

Re: Video on difference between V6 and straight six engines [Re: paulri] #5112433 05/22/19 01:55 PM
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DeepFriar Offline
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No, not as accurate as it could be. The lack of discussion of 60 degree versus 90 degree inclined V6's leaves a viewer beliving that all V-6's need balance shafts. They don't. Further, some mention of why there are 90 degree engines in stead of 60 degree ones (primarily the availability of 90 degree V8 tooling) might have shown a more indepth knowledge on the part of the author. Good example of the reason that second order imbalances are mitigated in straight 6's though.

Re: Video on difference between V6 and straight six engines [Re: paulri] #5112435 05/22/19 01:58 PM
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PimTac Offline
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What? No mention of the slant six?


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Re: Video on difference between V6 and straight six engines [Re: Kira] #5112446 05/22/19 02:06 PM
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Quattro Pete Offline
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Originally Posted by Kira
Volvo made their 5 cylinder engines since the '80's with great success.
They made 2.0, 2.3, 2.4, 2.5 liter versions in both turbocharged and normally aspirated variants.
2007 was the last year Volvo offered the 5 cylinder.

The straight five was offered in some Volvo applications up until 2016.


2002 530i   2015 Q5 3.0T   2018 Charger SRT
Re: Video on difference between V6 and straight six engines [Re: paulri] #5112500 05/22/19 03:06 PM
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meep Offline
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I do like the volvo 5s but they certainly have NVH tendencies which 4s do not, resulting in softer mounts to compensate - which is fine as long as you aren't deftly into performance. Volvo 5s with stiff mounts, from what I've read (and can believe) are not fun to live with as a DD. The power/torque curves I found ideal - more torque than a 4 but without the added size of a 6.


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Re: Video on difference between V6 and straight six engines [Re: Kira] #5112508 05/22/19 03:11 PM
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maxdustington Online Content
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Originally Posted by Kira
Accurate, yes.
Wanna show 'em how smart you really are???....get a 4.

Volvo made their 5 cylinder engines since the '80's with great success.
They made 2.0, 2.3, 2.4, 2.5 liter versions in both turbocharged and normally aspirated variants.
2007 was the last year Volvo offered the 5 cylinder.
Volvo also made 4 cylinder engines using the same design.
I suppose they still make a 4.
Still not as cool as a VR5


97 GMC RCLB K2500LD L30/4L60
Re: Video on difference between V6 and straight six engines [Re: paulri] #5112561 05/22/19 04:02 PM
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Cujet Offline
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Audi made a racing diesel 120 degree V6 with a hot-V configuration (exhaust ports on top)

[Linked Image]

Quote WIki:

"120° could be thought of as the natural angle for a V6. Each cylinder fires a power stroke every 120° of crankshaft rotation. This allows pairs of pistons to share crank pins (a connection on the crankshaft). Unlike the V8, there is no way to arrange a V6 to balance the piston forces. Because of the odd number of cylinders in each bank, a balance shaft is needed."

Last edited by Cujet; 05/22/19 04:04 PM.

People who count on their fingers should maintain a discreet silence.
Re: Video on difference between V6 and straight six engines [Re: paulri] #5112589 05/22/19 04:30 PM
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edyvw Offline
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Originally Posted by paulri
I just saw this on youtube: https://www.youtube.com/watch?v=u3XSfVPFM74

I really liked how simple it was for a non-mechanic like myself.

Is this accurate? Any points that he might have left out, in the pros/cons?

So, so.
It does not mention VR6 from VW, which currently has 10.6 degrees angle, one head.
It states: it makes inline 6 all but dead, then at the end says it is making come back.
V6 is cheap solution to more power. It allows you to use on multiple platforms, in both longitudinal applications (Lexus) and transverse applications (Toyota). So, it makes sense for manufacturers like that, it does not make sense for manufacturers like BMW that built name on inline 6 engines.
But, modularity between 4cyl and 6cyl means inline six will probably be engine design of choice for luxury brands bcs they will all have forced induction in order to meet emission standards, which means both 3, 4 and 6 cyl (like BMW) could be made on same line. Mercedes is bringing back I6 after 20 years, and FCA is also introducing I6, and apparently Mazda too.

Last edited by edyvw; 05/22/19 04:30 PM.

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Re: Video on difference between V6 and straight six engines [Re: paulri] #5112602 05/22/19 04:37 PM
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hatt Offline
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Inline 6 = Beauty and elegance.
V6 = sick


2013 F150 5.0, Delo XLE CK-4 10W-30, Baldwin B7449
2010 Camry 2.5, PP 10W-30, Mobil1 M1C-251A
Re: Video on difference between V6 and straight six engines [Re: paulri] #5112629 05/22/19 05:11 PM
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d00df00d Offline
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Originally Posted by paulri
I just saw this on youtube: https://www.youtube.com/watch?v=u3XSfVPFM74

I really liked how simple it was for a non-mechanic like myself.

Is this accurate? Any points that he might have left out, in the pros/cons?

It's good enough.

These days, either engine type can be made to be as smooth and/or powerful as it needs to be. Lighter internals go a long way toward mitigating vibration. I guess if you're really trying to push the limits of smoothness, you'd still prefer an inline-6, but I have a hard time imagining an application like that. It's more common to see applications where all you care about are power and compactness, and in those cases a V6 is a great call (e.g. Nissan GT-R, Ford GT, Acura NSX).

AFAIK, the main reasons to recommend one configuration over the other are packaging and development cost. Mercedes-Benz recently said they'll be phasing inline-6s back in, partly because they're producing a ton of inline-4s and it's super easy for them to derive an inline-6 by just tacking on 2 more cylinders. BMW has been all about inline-6s for a long time and has basically zero invested in V6s, so it makes sense for them to stick with inlines. On the other hand, if you're Hyundai, Nissan, or Honda, you're already make a ton of V6s to fit into FWD economy cars, so you probably won't be tempted to make an inline-6 even if you design a car that could be made to accommodate it (e.g. Genesis, GT-R). Audi is in a similar boat because it draws so heavily from the VW parts bin.


2008 BMW M3 Sedan 6MT
Re: Video on difference between V6 and straight six engines [Re: paulri] #5112633 05/22/19 05:17 PM
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hatt Offline
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I can't believe Toyota punted on the new Supra engine and used BMW.


2013 F150 5.0, Delo XLE CK-4 10W-30, Baldwin B7449
2010 Camry 2.5, PP 10W-30, Mobil1 M1C-251A
Re: Video on difference between V6 and straight six engines [Re: hatt] #5112644 05/22/19 05:39 PM
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edyvw Offline
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Originally Posted by hatt
I can't believe Toyota punted on the new Supra engine and used BMW.

Why?


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11' VW Tiguan 2.0T (Castrol 0W40+MANN filter)
Re: Video on difference between V6 and straight six engines [Re: d00df00d] #5112646 05/22/19 05:42 PM
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edyvw Offline
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Originally Posted by d00df00d
Originally Posted by paulri
I just saw this on youtube: https://www.youtube.com/watch?v=u3XSfVPFM74

I really liked how simple it was for a non-mechanic like myself.

Is this accurate? Any points that he might have left out, in the pros/cons?

It's good enough.

These days, either engine type can be made to be as smooth and/or powerful as it needs to be. Lighter internals go a long way toward mitigating vibration. I guess if you're really trying to push the limits of smoothness, you'd still prefer an inline-6, but I have a hard time imagining an application like that. It's more common to see applications where all you care about are power and compactness, and in those cases a V6 is a great call (e.g. Nissan GT-R, Ford GT, Acura NSX).

AFAIK, the main reasons to recommend one configuration over the other are packaging and development cost. Mercedes-Benz recently said they'll be phasing inline-6s back in, partly because they're producing a ton of inline-4s and it's super easy for them to derive an inline-6 by just tacking on 2 more cylinders. BMW has been all about inline-6s for a long time and has basically zero invested in V6s, so it makes sense for them to stick with inlines. On the other hand, if you're Hyundai, Nissan, or Honda, you're already make a ton of V6s to fit into FWD economy cars, so you probably won't be tempted to make an inline-6 even if you design a car that could be made to accommodate it (e.g. Genesis, GT-R). Audi is in a similar boat because it draws so heavily from the VW parts bin.

Actually Audi has V6, VW has VR6 engines. And it will stay that way. VW decided to separate Audi, Porsche, Lamborghini, Bentley as much as possible from VW, SKoda, SEAT. That is why VW just introduced new 2.5 and 3.0 VR6 turbo engines, at the same time when Audi and Porsche got 2.9 V6 engines. Those VR6 and V6 do not have anything in common except, maybe turbo charger.


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Re: Video on difference between V6 and straight six engines [Re: edyvw] #5112655 05/22/19 05:52 PM
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hatt Offline
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Originally Posted by edyvw
Originally Posted by hatt
I can't believe Toyota punted on the new Supra engine and used BMW.

Why?

Because Toyota builds better engines?


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